Closure



July 2, 1940. WAINWRIGHT CLOSURE Filed Feb. 16, 1933 2 Sheets-Shed 1 W W n M w mm A E m? H H. WAINWRIGHT CLOSURE July 2, 1940.

Filed Feb. 16, 1933 2 Sheets-Sheet 2 H m m wN %v, m E 5 m H ATTORNEY Patented July 2, 1940 UNITED STATES PATENT orrica CLOSURE Herbert Wainwright, Baldwin, N. Y., assignor,

by mesne assignments, to National Seal C'orporation, Brooklyn, N.

New York Y.,. a corporation 1 of Application February .16, 1933, Serial No. 657,026 3 Claims, (01. 215-44),

tion of this type to fit outside and around the neck of the container nozzle whereby a secure and perfect sealing is attained; to provide a closure formed integrally from a single piece of sheet metal having a straight circular side or depending skirt withthe lower rim folded over upon itself around the perimeter of the bottom edge of the skirt; to provide, a reentrant circular shelf formed around the inner side of the skirt 6 from which the. locking devices, preferably integral with this shelf, shall engage with either the threads (continuous or: divided) formed on the outside of the. container nozzle, or with spaced-apart lugs on such nozzle which-are to be engaged by a plurality of inwardly projecting lips extending from this circular shelf and preferably integraltherewith, for example, as shown in the U. S. Letters Patent to Lee No. 1,516,046 of November 18, 1924. p H

A further object of .my invention is to provide an improved closure of this type which shall consist of. asingle shell cap stamped from a single piece of sheet metal or other suitable material whichshall have a smooth finished exterior surface, particularly along the sides, that may be lacquered or otherwise decorated for ornamental purposes, combined with integrally formed looking devices, suchas threads or lugs, that are concealed within the cap. Such single shell cap avoids any danger of slippage between the outer shell and inner cap in the so-called two piece invention comprises thenovel construction, combination and arrangement of parts hereinafter described and then particularly pointed out in the appended claims.

In the accompanying drawings, Fig. 1 is a top plan view, partly broken away, of my improved closure having inturned lips to engage lugs on the outward neck of the container; 6 Fig. 2 is a sectiontaken on the line 2-2 of Fig. 1; r

Fig.3 is a top plan view of thi's'closure partly broken away;

Figs. 4. and 5 are detail sections on the line 4-4 of Fig. 3 showing different ways of forming the reentrant circular shelf carrying the inturned locking lipsg Fig. 6 is a bottom plan view, partly broken away, of my improved closure as applied to a container having threads on theouter nozzle;

Fig. 7 is a section on the line '|-1 of Fig. 6.

Fig. 8 is an enlarged detail section on the line 8-8. of Fig. 7; and

Figs. 9-14 are detail views, similar to Fig. 8, showing different ways of forming on the reentrant shelf the inner locking devices that engage the container threads.

Similar numerals refer to similar parts throughout the several figures.

Referring to Figs. 1-5 of the drawings, the container or bottle I 5 is preferably made of glass or other friable material, and has the upwardly projecting neck or nozzle l6 terminating in the mouth I'l. Encircling the nozzle l6 are the spaced-apart lugs l8 (three being shown in Fig. 1) integral with the nozzle l6 and having flat under surfaces 19 and rounded ends 20 as shown in Fig. 2'. l r

The closure 2i is stamped integrally of a single piece of sheet metal and comprises the flat circular crown 22 with depending circular skirt 23 having a smooth straight side as shown in Fig. 2. The lower edge of the skirt 23 is folded over on itself at 24 to form a rounded circular bottom edge. The reentrant circular shelf .25is formed" by the inwardly projecting extension of tlfe upper inner portion of the folded bottom edge 24 at right angles to the skirt 23, and extends around the inner side of the skirt 23 inside the bottom edge 24 from which integrally extend the inwardly projecting lips 26 with their leading ends 21 bent downwardly to engage readily the lugs l8 and the stops 28 formed inthe following ends as more fully described in Patent No. 1,516,046. The shelf is folded at 29 and rolled back at 30 upon its-elf andagainst the side wall of the skirt 23 between the lips 26 to; provide mutually parallel interlocking portions so as to make the required openings in the shelf 25 whereby the container lugs I8 may pass through the openings when the closure is pressed down on the container to enable the lips 26 to pass beneath the lugs l8 when the closure is turned into locking position as shown in Fig. 2. The

inner side of the crown 22 carries the liner 3| to enable the closure to make an effective seal with the container l5.

In Figs. 4 and 5 are shown modified forms of the circular shelf 25 in which the overlap 32 is folded upwardly'in Fig. 4 while in Fig. 5 such overlap 32 is bent under the shelf proper. In other details the closure is made as already described with reference to Figs. 1 and 2.

Referring to the constructions shown in Figs.

6-14, the container nozzle 16 carries the inclined threads 33 which may be either continuous or divided as the requirements prescribe. The closure 2i itself is the same as that already described in conjunction with Figs. 1-5, with the flat crown 22, depending skirt 23, folded over bottom edge 2 and liner 3|. However in the Figs. 6-14 construction the reentrant circular shelf 25 is' sheared and stamped back against the inner side walls of the skirt 23 atone or more places as shown in Fig. 7, while the remainder of this shelf 25 is given a spirally inclined pitch to conform with the spiral threads 33 on the container 6. Such shearing and crushing back of the shelf 25 makes the required openings for the container threads so that they will engage the circular shelf 25 on the inside of the skirt 23 to make a firm contact when the closure is screwed home.

In Figs. 7, 8 and 13 the overlap 32 is bent over the top of the shelf 25; in Figs. 9 and 12 such overlap 32 is folded under such shelf. In Fig. 14 the circular shelf 25 has its free edge curledunder upon itself to reinforce the shelf. Figs. and 11 show the shelf 25 in different stages of its manufacture inside the cap, but without the overlap 32. i

In both forms shown, the operation of aflixing the closures to the container is substantially the same in that the locking devices integral with the circular shelf 25 engage either the lugs l8 'orthe inclined threads 33 when the closure is forcibly turned into locking and sealing position.

In both forms my improved single-piece closure embodies in itself a simple and economically stamped cap that'provides smooth surfaces of metal which are exposed to view throughout when applied to the container, thereby enabling these surfaces to be painted or decorated .in any way desired, with the locking members on the recomprising a flat circular crown, a depending cylindric al skirt having straight sides of equal depth throughout the entire circumference of the cap with the bottom margin of the skirt folded inwardly to provide a uniformly rounded bead around the bottom edge of the cap, and spaced-apart flat locking lips extending inwardly substantially at right angles to the skirt at the top of the bead, portions of the metal between said lips being folded down to provide a rein? forcement for the lips and for the bead.

. '2. A single-piece sheet metal vcap for containers comprising a flat circular crown, a de-' pending cylindrical skirt having straight sides of equal depth throughout the entire circumference of the cap with the bottom margin of the skirt folded inwardly to provide a uniformly rounded bead around the bottom edge of the cap, and spaced-apart flat locking lips extending inwardly substantially at right angles to the skirt at the top of the bead having their leading ends downwardly inclined, portions of the metal between said lips being folded down to provide a reinforcement for the lips and for the bead;

3..A single-piece sheet metal cap for containers comprising a flat circular crown, a depending cylindrical skirt having straight sides of equal depth throughout the entire circumference of the cap with the bottom margin of the skirt folded inwardly to provide a uniformly rounded bead around the bottom edge of the cap, and spaced-apart flat locking lips extending inwardly substantially at right angles to the skirt at the top of the bead and having their leading ends downwardly inclined and their followingends upwardly projecting to form stops, portions of the metal between said lips being folded down to provide a reinforcement for the lips and for the bead, 1

v HERBERT WAINWRIGHT. 

